Home / 13,155.26-18,153.32-7,185.66

Finding the Fourth Proportional to 13,155.26, 18,153.32 and 7,185.66

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Solution

The fourth proportional to 13,155.26, 18,153.32 and 7,185.66 is: 9,915.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.26 : 18,153.32 = 7,185.66 : x
  2. Step 2: Convert to fraction form
    13,155.26/18,153.32 = 7,185.66/x
  3. Step 3: Cross multiply
    13,155.26x = 18,153.32 × 7,185.66
  4. Step 4: Simplify right side
    13,155.26x = 130,443,549.46
  5. Step 5: Solve for x
    x = 130,443,549.46/13,155.26
  6. Step 6: Final answer
    x = 9,915.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.